Audemars Piguet Perpetual Calendar Openworked

The Audemars Piguet Royal Oak Perpetual Calendar Openworked 26585CE.OO.1225CE.01 features an octagonal case in black ceramic, measuring 41mm with a thickness of 9.9mm, paired with a matching ceramic bracelet. The skeletonized dial reveals the perpetual calendar mechanism and moonphase display, protected by a glareproofed sapphire crystal. Inside is the selfwinding calibre 5135, offering 40 hours of power reserve and displaying hours, minutes, perpetual calendar, and moon phases. The case is water resistant to 20 meters.